The recognition of contraction of the pelvic outlet is almost as old as the recognition of the contracted inlet.Williams 1 cites reports by Deventer, de la Motte, and Smellie of isolated cases of outlet contractions. Breisky,2 in 1870 recommended the examination of the intertuberous diameter and invented a pelvimeter to measure it. Klien3 measured the posterior sagittal diameter of the outlet and made the statement that if the intertuberous diameter were 8.5 cm., it would be necessary for the
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